1252662891660 has 72 divisors (see below), whose sum is σ = 3799880806176. Its totient is φ = 334031420160.

The previous prime is 1252662891643. The next prime is 1252662891679. The reversal of 1252662891660 is 661982662521.

1252662891660 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 6 + 628 + 9 + 1 + 6 + 6 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1252662891597 and 1252662891606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5623200 + ... + 5841720.

It is an arithmetic number, because the mean of its divisors is an integer number (52776122308).

Almost surely, 2^{1252662891660} is an apocalyptic number.

1252662891660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252662891660 is an abundant number, since it is smaller than the sum of its proper divisors (2547217914516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252662891660 is a wasteful number, since it uses less digits than its factorization.

1252662891660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250383 (or 250378 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 1252662891660 in words is "one trillion, two hundred fifty-two billion, six hundred sixty-two million, eight hundred ninety-one thousand, six hundred sixty".